network benchmark that measures the net throughput of a network

NETIO is a network benchmark that measures the net throughput of a network via NetBIOS, UDP and TCP protocols (Unix only supports TCP and UDP) using various different packet sizes. One instance has to run on one machine as a server process, another instance is used on another machine to perform the benchmark. When executed without arguments, the program will explain its usage. NOTE: Free for personal use.

http://www.softpedia.com/progDownload/NETIO-Download-76189.html
http://freshmeat.net/projects/netio/
http://www.ars.de/ars/ars.nsf/docs/netio